metamorphism

Types:

anamorphism

metamorphism that occurs deep under the earth's surface; changes simple minerals into complex minerals

epigenesis

a geological change in the mineral content of rock after the rock has formed

katamorphism

metamorphism that occurs at or near the earth's surface; breaks down complex minerals into simpler ones

Type of:

geologic process, geological process

(geology) a natural process whereby geological features are modified